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Questions tagged [imap]

IMAP stands for Internet Message Access Protocol and is the other e-mail protocol along with POP.

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Dovecot error when trying to access mailbox

I can't get DoveCot functioning on one domain out of several domains and users. All others work perfectly. When trying to connect to this user's mailbox I get a server error "Internal error ...
pavaros's user avatar
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156 views

Disable 2FA on Microsoft 365

My organisation uses Microsoft365 for Outlook email. Microsoft disabled basic authentication on October 2022, although there was an extension given to some organisations, including ours, to 25th ...
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imapfilter - does a mailbox exist

Sorry bit of a imapfilter 101 I'm afraid ... I'm trying to do something quite simple. I seems to be making heavy weather of it, feels like there's a simple solution. I want to process inbox into new ...
GraemeV's user avatar
-1 votes
1 answer
41 views

Use HTTPS and IMAP services on the same port

Is there any multiplexer that allows the use of both HTTPS and IMAP on port 993 like what SSLH does for SSH and HTTPS & etc.?
wertvoll's user avatar
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How to assign certificate to IMAP/S and SMTP/S in Exchange 2016?

Please advise me because I pull all my hair out. I have Exchange 2016 and I want to assign one officially signed-off certificate to the IMAP/S port 993/tcp and SMTP/S port 465/tcp . I went through ...
supi007's user avatar
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How to disable an IMAP capability in Dovecot?

For testing purposes, I want to disable specific capabilities in a Dovecot IMAP Server. In the documentation, I only find imap_capability Default: <empty> Values: String Override the IMAP ...
not2savvy's user avatar
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1 answer
901 views

How to enable IMAP PHP extension on AWS EC2 instance Amazon Linux 2023?

This question is related with the following one: How to enable IMAP php extension on aws EC2 instance but they are completely different. I use PHP 8.1 and Amazon Linux 2023, this version does not have ...
Carlos's user avatar
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302 views

Can not setup postfix/dovecot with email clients

Having problems with configure postfix/dovecot with email clients such as outlook and thunderbird. Using telnet and openssl I have tested both smtp and imap through ports 587 and 993. Sent mails are ...
Dio Anderson's user avatar
1 vote
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360 views

Configuring cyrus to use oauth2 via keycloak with ldap backend?

We are using cyrus (and exim) as a long-running mail server. The requirement to store passwords in email programs seems to be a security risk to me. I would like to move auth behind something like ...
till's user avatar
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266 views

NGINX Mail proxy IMAP Auth Errors

I need some help getting NGINX to perform IMAP authentication as a reverse proxy into Postfix Mail server on-prem. I am seeing the tracking on my POSTFIX mail server, but IMAP continues to fail. seems ...
user2569708's user avatar
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Dovecot fails to fetch messages due to cache size issues

I migrated maildir users from an old courier imap install to dovecot on docker alpine:latest. Initially everything seemed great, however, a problem seems to have crept in. Some messages will fail to ...
lopass's user avatar
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how to setup the folder separator a "/ " instead of a dot "." in imap maildir postfix and dovecot

The Question is already in the title. I want to setup dovecot and postfix with maildir , but I do not want the dot "." as folder separator. I like to use a folder system like "/" ...
Max Muster's user avatar
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803 views

Dovecot auth-worker logs fails but log in works

Everytime a log in occurs I get three log lines: Mar 19 15:29:05 auth-worker(6379): Info: pam([email protected],124.1.1.1,<AL/fkjf3yr98xTrl>): pam_authenticate() failed: Authentication failure (...
Grandmaster Og's user avatar
-2 votes
2 answers
819 views

Why does IMAP specify a UID as well as UIDValidity

What is the design reason for uniquely identifying mail on a folder by folder basis rather than on a server wide basis? IMAP specifies that mail is uniquely identified by a folder name, a UIDValidity (...
Dom's user avatar
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Dovecot + imap_sieve learning spam

Have dovecot+sieve. It's most often recommended that users train spamassassin/rspamd in the following way: A Spam folder is created in each mailbox (Junk type) Further, through the imap_sieve plugin, ...
cozby's user avatar
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Client is sending SMTP emails but they are not recorded in the "Sent" folder in webclients

I have been using instantly.ai to send emails. I connected IONOS.ca and JustHost.com mailboxes to instantly and it works fine (warmup, receiving and sending [yes other emails receive the emails sent, ...
Guest Man's user avatar
-1 votes
1 answer
231 views

Send email to different port / redirecting port

I have an email server (Dovecot) and I want to emails be sent from other servers to a different IMAP port, because I can't use the ports 465 and 993 If someone could help me doing this, I would ...
brokenPipe's user avatar
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1 answer
130 views

Additional mail check by a custom script on Exchange Server

Customer would like to check e-mail content (including attachment parsing) from a list of accounts and, in case of some detected trigger words, to send a copy of the mail to a person who has to be ...
Alexandr Ch's user avatar
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1 answer
1k views

Dovecot expunge all emails marked as deleted regardless of folder

I would have thought that this would be a FAQ but I haven't found a useful answer. How do I expunge all email messages deleted using the email client regardless of which folder it's in?
Gary Stainburn's user avatar
1 vote
0 answers
127 views

Webclient for mbox files

I have 20 OVH mail accounts. Whit imapbackup i create mbox file for each my account on a local server. To read the files i need to download the folder then import to Thunderbird. Is there a easy way ...
enrico-dev's user avatar
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'FETCH' command with a 'BAD' response: Error in IMAP command FETCH: Invalid messageset (0.001 + 0.000 secs). on DoveCot IMAP Server

I'm hosting my webserver using postfix and dovecot. it works fine when i try to connect using my iphone and my macbook. I need to connect an external WebbApplication to get all E-Mails over IMAP ...
El-Salatinie's user avatar
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1 answer
276 views

How to subscribe to Office 365 IMAP folders

since about the beginning of November, I have troubles in using mail clients to access Office 365 mailboxes via IMAP. Specifically, it has become impossible to subscribe to IMAP folders, so that the ...
callegar's user avatar
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1 vote
1 answer
542 views

How best to deal with large dovecot inboxes?

I have a small number of mail users (abut 100) and some have comparatively large (10Gb+) mail boxes. I'm running Ubuntu using postfix and dovecot Maildir format. I could just keep adding storage, but ...
TommyPeanuts's user avatar
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1 answer
117 views

Migration plan for hosted e-mail

I am considering migrating my e-mail from one hosted provider to another; specifically to Proton Mail, but I don’t think that matters. My trepidation comes from my personal domain and the potential ...
Xophmeister's user avatar
2 votes
1 answer
381 views

Android application compatible with IMAP search without using local index?

I use an email account of several dozens of Giga, on computer and Smartphone. However, most applications use a local index to speed up the search of emails (this is the case of Outlook and Thunderbird ...
VanVan's user avatar
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1 answer
218 views

Can I host some mail addresses in Microsoft 365 and keep the others in IMAP host?

I manage a company with 200 users, all of them having IMAP mail in a cloud based hosting (not on premise); now I want to migrate some of those users on Microsoft 365, keeping the most of them on IMAP; ...
SYS64738's user avatar
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1 answer
442 views

Postfix: dedicated user to send emails

My current Postfix setup allows to send emails only with the local users (like, if I logged as xyz then email will be sent as [email protected]). I have Courier IMAP server, with the same user xyz but ...
Green Root's user avatar
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1 answer
797 views

Does email client connect to IMAP/SMTP server by resolving IP through A record or MX record?

With my limited understanding, I understand when an SMTP server sending email out, it resolves the MX record to get to the destination email server. But what about when you setup an email account on ...
Nick Li's user avatar
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418 views

How to configure Exim4 to relay emails from authenticated users in various locations

I have a Debian cloud server with Exim4 running and serving emails with DMARC, SPF, and DKIM properly set up. I can ssh into the server and send and receive encrypted emails successfully. Dovecot is ...
Jeff12's user avatar
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68 views

How to permit only certain e-mail clients for IMAP access

My company is giving out new Android smartphones to employees, and they should be able to manage their e-mail on them. Currently, only access via webmail is enabled, but the mobile webmail client (...
Ben Opp's user avatar
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0 answers
206 views

Bizarre intermittent, but long lasting failure to connect to just one server

I have a bizarre connection issue with just one server that I have no idea how to diagnose. Basically I'm setting up a self-hosted email service using iRedMail and everything works fine for a while ...
Brad Robinson's user avatar
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1 answer
1k views

How to create failregex to block imap-logins fail2ban

Could someone help me with creating correct fail2ban filter. Bad ip addresses knocking port 993 /etc/fail2ban/filter.d/dovecot.conf doesn't catch such log I found something like this, but i get errors ...
kusjev's user avatar
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1 answer
2k views

Is it possible to trigger a shell script on incoming emails, can it be done without services like dovecot, postix, etc? [closed]

This question more is for learning purpose. I'm exploring ways to develop a small email server (in + out). I have a domain that points to my server as well as mx records and all that stuff... I also ...
Jintor's user avatar
  • 139
0 votes
1 answer
192 views

manual certificate authentication for IMAPS

I'm running an IMAPS service and users are authenticated with an X.509 certificate. It works fine using Thunderbird. But how I can connect to the IMAPS service manually using openssl? I use the same ...
Micha's user avatar
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0 votes
1 answer
429 views

Share Postfix IMAP Calenders

We are currently running a dovecot mailserver(maildir) and postfix. - Ubuntu 18.04.6 LTS (Bionic Beaver) Our new COO wants to sync his contacts and calendar with outlook(MAC) and iOS(iPhone) using our ...
ragnarlod's user avatar
1 vote
0 answers
883 views

Exchange 2019 - IMAP Sync Failure

I have just deployed a new instance of Exchange 2019. Active Sync works fine (outlook and owa) and mail is processed ingress/egress fine. After enabling the IMAP services and associating the self ...
Les's user avatar
  • 11
1 vote
1 answer
948 views

MDA broken pipe with fetchmail / dovecot

I have set up a home mail server with dovecot to download and archive email from multiple webmail accounts via IMAP. The goal is to do this automatically every week with a cron job. I'm not sure if I ...
b20000's user avatar
  • 131
0 votes
1 answer
564 views

does SSL/TLS STARTLS full encrypt connexion for POP and IMAP

I am configuring POP and IMAP accounts in thunderbird mail client. Here are 2 options: Security: None SSL/TLS STARTLS Authentication method: Normal password Encrypted password Kerberos / GSSAPI ...
Bob5421's user avatar
  • 429
1 vote
1 answer
547 views

Fetchmail does not use the indicated protocol

I'm trying to setup fetchmail for download some mail from gmail using pop3. The problem, as you can see, is that fetchmail instead of use the pop protocol will use imap. For being sure to not have ...
DottorBooom's user avatar
1 vote
1 answer
75 views

Clarification on the configuration of a mail server

I would like to start by saying that I have not seen any other forums or posts that clearly explain this thing. If there are, my poor English skills probably didn't make me understand the solution ...
DottorBooom's user avatar
1 vote
1 answer
531 views

How do I create separate mailbox configurations per virtual user with Dovecot?

Let's say I have two virtual users: [email protected] and [email protected]. I want the mailboxes for bugs to be configured like this...: mailbox Sent { special_use = \Sent } mailbox Drafts { ...
The Tablet's user avatar
1 vote
1 answer
3k views

IMAP and SMTP Still use Self Signed SSL even I have issued a Mail Server SSL in Cyberpanel

I using cyberpanel on CentOS 7 and I setup SSL for my postfix and dovecot. But I still got "SSL Invalid" caused the self-signed SSL even I have configure SSL using Lets Encrypt. This is /etc/...
xdnroot's user avatar
  • 21
0 votes
1 answer
1k views

How to proxy IMAP/POP3 connection to appropriate backend mail server by domain

I have system with multiple email server (exchange, zimbra) for multiple domain. So when users of domain A want connect to server for getting email they have to use IP of server A (Ex: 192.168.10.253),...
Khoa Le Anh's user avatar
0 votes
1 answer
248 views

How to stop OS/daemon information leakage in dovecot (server_tokens)?

How do I stop dovecot from telling its clients what flavour of linux I'm running and that it's a dovecot imap server? If I connect to my smtp server, I see the following snippet user@host:~$ openssl ...
Michael Altfield's user avatar
0 votes
1 answer
108 views

Access POP3 content from other computer

I have a tough mission, that I have no idea how to accompish it. In our company, all the e-mail accounts are configured as IMAP accounts, therefore we can access the e-mail from wherever. However, ...
questionador's user avatar
0 votes
1 answer
639 views

Incoming external email appeared in Postfix log, but not in mailbox

I setup Postfix + Dovecot (with IMAP) for my Ubuntu 16.04 email server. I sent an email from Gmail to my domain, I can see the postfix log "reacts" with the incoming email, but the incoming ...
Raptor's user avatar
  • 1,041
0 votes
1 answer
1k views

Postfix dovecot unable to authenticate

I use to work with postfix/sasl/courrier-auth on Gentoo for years. I just migrated to Debian 10 postfix/dovecot. I'm unable to make it work : Send mail ok, TLS ok. But unable to authenticate (SMTP 587,...
user625434's user avatar
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0 answers
2k views

dovecot: imap-login: Aborted login (auth failed, 2 attempts in 2 secs) - usually working - perhaps timeout issue? Debug options?

I have a mail server with a few dozen IMAP accounts. The configuration is correct for each account, every one of them tests OK. When a client from a particular, very slow Internet connection attempts ...
Ned64's user avatar
  • 323
0 votes
1 answer
918 views

Are SMTPS and IMAPS ports really deprecated?

I've read that STARTTLS command was added and intended to deprecate the SSL ports. But even major mail servers like google still use SSL ports and even don't allow us to use classic ports with ...
knight_lightning's user avatar
0 votes
0 answers
739 views

Is there a way to force logout/relogin of IMAP user?

As an admin of a Mail server, I would like to force logged-in users of an email account (e.g. in their Outlook, Thunderbird) to login again with new password and prevent everyone from sending/...
kub1x's user avatar
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